Test/review of Efest IMR18350 700mAh (Purple) 2017

Batteries and Chargers Rechargeable Batteries
1

Efest IMR18350 700mAh (Purple) 2017







Official specifications:

  • Size: 18350 (18.3mm diameter x 34.63mm long)

  • Type: Li-Mn (Rechargeable)

  • Rated Capacity: 700mah

  • Max Discharge Current: 10.5A

  • Voltage: 3.7V

  • Protected: No

  • Style: Flat Top

  • Weight: 28g

  • Initial Impedance: 15mOhm




This is a high current 18350 cell.











The discharge curves looks good with nice tracking up to 7A. At 10A one of the cells has problems and at 15A both cell are serious over loaded.





















Conclusion

The cell has good high current capability, the capacity is fine, but it is not a high capacity cell.



Notes and links

The batteries was supplied by Efest for review.

How is the test done and how to read the charts
How is a protected LiIon battery constructed
More about button top and flat top batteries
Comparison to other LiIon batteries
2

what does it mean that it is not a hight capacity cell? Does that refer to the700 mAh? That new cell, the Aspire, is rated at 1100 mAh.

thank you

3

You can find 18350 cell that can deliver less current, but more capacity. Usual there is some trade off between high current and high capacity. The Aspire is an exception to that.